Withdrawing means for side-slip weft detectors



Dec. 13, 1927. 1,652,593

W. WAKEFIELD WITHDRAWING MEANS FOR SIDE SLIP WEFT DETECTORS Filed 91 59?2 ufiwfififi 1 WALTER H. WAKE F] E LD W'FM AT TO RN Eys Dec. 13, 1927.1,652,593

w. H. WAKEFIELD WITHDRAWING MEANS FOR SIDE SLIP WEFT DETECTORS Filed May20. 1926 2 eats-Sheet 2 1 g-lm- 3 /////////lm 4 I Z} i 7 y INvE NTORWALTER H. WAKEFIELD ATTQRNE s Patented Dec. 13, 1927.

UNITED STATES PATENT OFFICE.

WALTER H. WAKEFIELD, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON &KNOWLES LOOM WORKS, OF.WORCESTER, MASSACHUSETTS, A CORPORATION OFMASSACHUSETTS.

WITHDBAWING MEANS FOR SIDE-SLIP WEFT DETECTORS.

Application filed May 20,

This invention relates to improvementsin means for withdrawing loom weftdetectors of the side slipping type and it is the principal object ofthe invention to aflord simple means readily adjustable for withdrawingthe detector on transferring beats of the loom and also to prevent arepetition of the indication of weft exhaustion.

In automatic box looms the weft detector is usually mounted on themagazine side of the loom and where the detector passes through a slotin the shuttle it is necessary that the detector be removed ontransferring beats to clear the path of the incoming full bobbin. Loomsof the type specified are usually equipped with a regularlyreciprocating actuating lever which is normally free to move withoutinterruption but which at-indication of weft exhaustion is held againstnormal movement by a controller pin and it is a still further object ofmy invention to withdraw the controller pin to prevent a repeatedindication of weft exhaustion when the exhausted shuttle arrives underthe magazine for replenishment.

It is a more particular object of my invention to provide a combinedcontroller pin and detector withdrawing device having connected portionswhich afford relative adjustments to the end that the detector may bemoved longitudinally with respect to the shuttle without disturbing thenormal position of the controller- It is a still further object of myinvention to provide an improved weft detector withdrawing element whichis lengthened to afford additional bearing surface to the end that saidelement may be given extra support when in detector withdrawingposition.

The detector of the type to which my invention more particularly relatescomprises a bent wire movable angularly in a supporting housing and itis a further object of my invention to provide a withdrawing means forthe detector so constructed as to prevent accidental displacement of thewithdrawing means and the connected controller, the means employed beingequally effective in all adjusted positions of the detector and servingalso to prevent the controller pin from eing dislodged from its guide.

With these and other objects in viewwhich 1926. 'Serial N0. 110,552.

willappear as the description proceeds my invention resides in thecombination and arrangement of parts hereinafter described and beingindicated in dotted lines,

Fig. 2 is a vertical section on line 2+2 of Fig. 1 looking'in thedirection of the-arrows,

Fig. 3 is a front elevation of the detector on a reduced scale lookingin the direction of arrow 3, Fig. 1,

Fig. 4 is a top plan view of the controller withdrawing element with theassociated parts indicated in dot and dashlines, and

Fig. 5 is a vertical section on line 5-5 of Fig. 1. p i

Fig. 6 is a vertical section on line 6-6 of Fig.

Referring particularly to Figs. 1, 2, and 3 it will be seen that I haveprovided a loomside 10 and breast beam 11 on which is mounted the frame12 of a weft replenishing mechanism preferably of the multi-color typesuch as set forth in Patent No. 1,030,748. The frame 12 is provided witha stud 13 on which is pivotally mounted the hub 14 of a transferrerlever 15 the rear bobbin engaging arm 16 of which extends over theshuttle S and bobbin B when the lay is on front center. The transferrerarm has depending legs 17 between which extends a stud 18 by means ofwhich the transferrer is given a downward movement on the transferringpick of the loom by connections not shown.

A stand 19 is bolted to the loom frame and has vertically reciprocablymounted therein a block 20 on which is pivoted an actuator lever 21 theinner end of which is connected to a magazine actuatin rod 22 and theother end of which lies in s 0t 23 formed inthe stand. lVhen there issufiicient weft present for continued weaving the actuator lever 21 willbe free to descend in slot 23, but; when insufficient weft is present acontroller pin 24 will be under the outer end of the actuportion thereofand ator lever 21 and as the block descends rod 22 will be given adownward movement to initiate replenishment. The matter thus fardescribed is of common construction and may be as set forth in theaforesaid patent, the only difference being that controller pin 24 issomewhat different from that shown in the aforesaid patent.

In carrying out my invention I provide a bracket to which is bolted astand 31 having a horizontal slot 32 to receive a bolt 33 which passesthrough a vertical slot 34 formed in support 35. The upper part of thesupport is flattened as at 36 to form the lower portion of a detectorhousing the upper part ofwhich is provided by a cap 37 The support isprovided with a boss 38 and is surrounded for the most part by anupstanding flange 39. Said flange is broken away at the rear rightportion to define a shoulder 41 and there is projecting lnwardly fromthe left hand side of the flange a lug 42 which defines a notch 43.

r The detector which I employ is formed of a single piece of wire D bentat the rear having teeth 44 cut therein, the forwardly extending portionof the wire being curved as indicated in 1 and normally lying in contactwith shoulder 41. Saidwire is provided with a bentportion 45 and astraight portion extending to the left as indicated at 46. The extremeforward end of the wire is formed as a pivot indicated at 47 soproportioned as to be received in notch 43. The distance between theright hand portion of the bend 45 and the left end of the detector isslightly lessthan the distance between the inside side walls of theflange 39, the purpose of this construction being to prevent unduelateral movement of the detector. The forward portion ofthe wire isprovided with a crimp 48 which receives the forward end of a coil spring49 the rear end of which is received by a projection 50 cast on thesupport. The normal function of the spring 49 is to hold the pivotportion 47 in the notch 43 and the curved rearwardly extending part ofthe detector against shoulder 41 thus positioning said detector forproper engagement with the surface to be detected.

In carrying my invention into further effect I provide the controllerpin 24 with a laterally extending bent portion indicated at 60, said endbeing bent back upon itself to define a slot 61 and the rear bentportion being in front of one of the legs 17 so that as the latter movesforwardly the controller will be moved therewith. Said controller asindicated in Fig. 4 is formed ofrelatively heavywire such as will resistthe pressure of actuator lever 21.

.The. withdrawing element is formed of a relatively lighterwire IV theforward portion of which isbent back on itself to form a slot 62, oneend of the wire being extended as at63 along the adjacent leg 17 toserve as a guide to restrain lateral movement to the left of thecontroller pin and withdrawing wire should these parts for any reason begiven an undue forward movement. The rearwardly extending arm of thewire IV passes through a groove 63 formed in the front part of flange 39asindicated inFigs. 1 and 3. Said portion of the wire (V is providedwith a notch 64 which extends over and behind that portion of thedetector D which lies between the pivotal end 47 and the crimp 48. Thehorizontal portion 36 of the support is provided witha shoulder 65 asshown in Fig. 6 along which the rear portion of the wire D is guided toprevent lateral movement to the left as viewed in Fig. 1. The wire D isextended beyond the notch 64 and is bent upwardly as at 66 to be inengagement with the top of cap 37 near the rear portion thereof. Infront of the notch 64 is an oflset 67 which is so positioned that whenthe detector-is given its maximum, forward position said notch will bein engagement with a portion of the flange 39 to prevent the wire W frompassing through the groove 63 The slots 61 and 62 cross each other asindicated in Fig. 4 and have extending therethrough a holding bolt orscrew 68 the lower part of which has threaded thereon a nut 69, therebeing washers 70 in engagement with the wire W and the forward portionof the'controller pin to hold said parts firmly together when the boltand screw are tightened.

The operation of the device is substantially the same as set forth inco-pending application Ser. No. 111,661 filed by Blanchard, the wire Dbeing moved forwardly when sufficient yarn is present to give a forwardmovement to withdraw wire W and controlling pin 24, the latter movingfrom under the actuator lever 21. When insufficient yarn ispresent,however, the de tector D swings around the notch 43 as a pivotand the wire IV and therefore the controller pin 24 will remainpractically at rest so that downward movement of the actuator lever 21is interrupted and indication of weft exhaustion is given to themagazine by rod 22 as set forth in the aforesaid patent.

On a subsequent beat of the loom when the shuttle which previously gaveindication of weft exhaustion is under the magazine the transferrer arm15 will descend by mechanism not shown but well understood and one ofthe legs 17 will engage the offset portion 60 of the controller pin,moving the latter forwardly so as to be out of the path of the actuatorlever 21 and by means of the bolt 68 serving also to withdraw thedetector D from the path of the incoming bobbin. Too great a forwardmovement of the parts shown in Fig. 4 will be prevented by the offset67.

It occasionally happens that the stand 35 is moved longitudinally of theshuttle to vary the point at which the teeth 44 will engage the surfaceto be detected and in order to accommodate this motion the bolt 68 canbe loosened and moved along slot 61 in the proper direction until thewithdrawing wire W is in proper position relatively to the detector D,after which the nut 69 will be tightened. Should the detector be movedrearwardly or forwardly relatively to the actuator lever 21 acorresponding adjustment can be made by moving the bolt 68 in slot 62.

From the foregoing it will be seen that I have provided a very simplemeans for withdrawing the detector on transferring beats of the loom andalso for preventing a repetition of the indication of weft exhaustion bymoving the controller pin 24 from under the actuator lever 21. It willfurther be seen that by reason of the slots 61 and 62 and the bolt 68passing therethrough relative lateral and back and forth adjustments ofthe wire WV may be made with respect to the controller pin. It willfurther be seen that the offset- 67 in wire V prevents loss ordislocation of the controller pin and withdrawing wire and it willfurther be noted that the rear extension 66 of the wire beyond the notch64 affords additional support for the wire V when the latter is inforemost position, this support assisting in holding the controller pinin proper alignment with respect to the actuator lever.

Having thus described my invention, it will be apparent that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and scope of the invention, and I do not wishto be limited to the details herein disclosed but what I claim is:

1. In a weft detector for looms, a support, a side slipping weftdetector mounted on the support and having an angular movement onindicating beats of the loom and having a forward sliding movement onnon-indicating beats of the loom relatively to the support, an actuatorlever, a controller therefor, a withdrawing means operatively connectedto the detector and guided by the support, means defining a slot in the0011- troller member and also the withdrawing means, said slots crossingeach other, and means passing through the slots'to secure the member andmeans together in any one of a plurality of different positions, andmeans to move the member and means forwardly on transferring beats ofthe loom to withdraw the detector from the path of the incoming bobbinand to move the controller out of operative relationship with respect tothe actuator.

2. In a weft detector for looms, a support, a side slipping weftdetector mounted on the support and having an angular movement onindicating beats of the loom and having a forward sliding movement onnon-indicating beats of the loom relatively to the support, an actuator,a controller therefor formed of a wire havin one end thereof bent backon itself to define a slot, a withdrawing means for the detector guidedby the support and formed ofa wire the forward end of which is bent backon itself to form a slot disposed out of parallelism with respect to thefirst named slot, means passing through the slots and binding thecontroller and withdrawing means together, and means acting on one ofsaid wires to move both of them forwardly on transferring beats of theloom.

3. In a weft detector for looms, a support, a side slipping weftdetector mounted on the support and having an angular movement onindicating beats of the loom and having a forward sliding movement onnonindicating beats of the loom relatively to the support, an actuator,a controller member therefor normally disposed to interrupt movement ofthe actuator, a withdrawing member for the detector, means to adjustablyconnect the controller and withdrawing means together to cause the sameto move in unison, and means operative on transferring beats of the loomto engage one of said members to move the detector out of the path ofthe incoming bobbin and the controller out of the path of the actuator.

4. In a weft detector for looms, a support having a cap, a side slippingweft detector mounted on the support and under the cap and having anangular movement on indicating beats of the loom and having a forwardsliding movement on non-indicating beats of the loom relatively to thesupport, withdrawing means for the detector having operative contactwith said detector, means operative on transferring beats of the loomand normally independent of the withdrawing means to give the latter awithdrawing movement to move the detector out of the path of theincoming bobbin, said withdrawing means being guided by the support andhaving a portion extending upwardly and beyond the detector and insliding contact with a portion of the cap of the support to affordadditional supporting means for the withdrawing means when the latter isgiven a withdrawing movement.

In testimony whereof I have hereunto affixed my signature.

WALTER H. WAKEFIELD.

